Sure, Google Calendar is helpful, but ultimately it's on you to get yourself to that meeting. Wouldn't it be nice if the utility could handle some of the to-do list itself? Hack A Day scoped out an example of it doing just that, after a home owner named Shane posted a video of his DIY system that uses Calendar to control his heater. First, he connected a USB-powered mbed microcontroller with an ARM Cortex M3 processor to the internet via an Ethernet cable. As it happens, the mbed also has a temperature controller and solid state relay for turning the heater on and off. On the so
